Before he ever lifted his mighty hammer, fantastic journeys beckon from the mysterious nine realms: places of dark mists and fiery voids, of winged creatures and giants in the ice. And of the most alluring quest of all: the search for the legendary Lost Sword of Surtur. Hungry for adventure, Thor secretly embarks on the journey of a lifetime, joined by his loyal brother Loki, whose budding sorcery equips him with just enough magic to conjure up trouble, along with the Warriors Three, a band of boastful travelers reluctant to set sail on any adventure that might actually be dangerous. But what starts out as a harmless treasure hunt quickly turns deadly, and Thor must now prove himself worthy of the destiny he covets by saving Asgard itself.